WO2005047790A2 - Method and installation for enriching a gas stream with one of the components thereof - Google Patents
Method and installation for enriching a gas stream with one of the components thereof Download PDFInfo
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- WO2005047790A2 WO2005047790A2 PCT/FR2004/050570 FR2004050570W WO2005047790A2 WO 2005047790 A2 WO2005047790 A2 WO 2005047790A2 FR 2004050570 W FR2004050570 W FR 2004050570W WO 2005047790 A2 WO2005047790 A2 WO 2005047790A2
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- fraction
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- column
- separation unit
- mixing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/0446—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/0446—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases
- F25J3/04466—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases for producing oxygen as a mixing column overhead gas by mixing gaseous air feed and liquid oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
- F25J3/04551—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production
- F25J3/04557—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production for pig iron or steel making, e.g. blast furnace, Corex
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04593—The air gas consuming unit is also fed by an air stream
- F25J3/046—Completely integrated air feed compression, i.e. common MAC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04812—Different modes, i.e. "runs" of operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
- F25J2200/06—Processes or apparatus using separation by rectification in a dual pressure main column system in a classical double column flow-sheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/42—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being nitrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
- F25J2240/42—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval the fluid being air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/40—One fluid being air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/42—One fluid being nitrogen
Definitions
- the present invention relates to a process and an installation for enriching a gas flow with one of its constituents.
- it relates to a process for enriching air with oxygen.
- Oxygen enrichment of the air has become necessary in the steel industry.
- the reduction or elimination of hot coke in the blast furnace, for the general benefit of the injection of pulverulent coal (PCI) implies this necessary evolution.
- the means known from EP-A-0531182 for economically achieving this enrichment consists in the cryogenic distillation of part of the air flow from the blast furnace. There is thus obtained a flow rich in nitrogen and a flow rich in oxygen, the latter then being re-mixed in the air flow downstream of the air separation unit.
- Figure 1 shows a separation device described in EP-A-0531182 intended to enrich the air with oxygen. It is supplied from the air network constituting the charge of a blast furnace, at a pressure P.
- the air distillation apparatus is intended to produce low purity oxygen, for example having a purity of 80 at 97% and preferably 85 to 95% under a determined pressure slightly greater than the pressure P., for example advantageously under a pressure greater than 1 ⁇ 10 4 Pa abs to 1 ⁇ 10 5 Pa at the pressure P.
- a device essentially comprises a heat exchange line 1A, a double distillation column 2A itself comprising a medium pressure column 3A, a low pressure column 4A and a main condenser-vaporizer 5A, and a mixing column 6A.
- Columns 3A and 4A typically operate at approximately 5.45 x 10 5 Pa and approximately 1.5 x 10 5 Pa respectively.
- a mixing column is a column which has the same structure as a distillation column but which is used to mix in a manner close to reversibility a relatively volatile gas, introduced at its base, and a less volatile liquid, introduced at its top. Such a mixture produces refrigerating energy and therefore makes it possible to reduce the energy consumption linked to distillation.
- this mixture is used, moreover, to directly produce impure oxygen under the pressure P, as will be described below.
- an air flow is compressed at the pressure of the mixing column by a compressor 14A, cooled in the exchange line 1A, sub-cooled in the sub-cooler 21A and sent to the tank from the mixing column 6A.
- "Rich liquid” air enriched in oxygen
- taken from the tank of column 3A is, after expansion in an expansion valve 10A, introduced into column 4A.
- “Lean liquid” (impure nitrogen) taken from an intermediate point 11 A of column 3A is, after expansion in an expansion valve 12 A, introduced at the top of column 4A, constituting the residual gas of the installation, and the pure nitrogen gas under the medium pressure possibly produced at the head of the column 3A, are heated in the exchange line 1A and evacuated from the installation. These gases are indicated respectively by NI and NG in FIG. 1. Liquid oxygen, more or less pure depending on the setting of the double column 2A, is withdrawn from the tank of column 4A, carried by a pump 13A at a pressure P1, slightly higher than the aforementioned pressure P to take account of the pressure losses (P1-P less than 2 ⁇ 10 5 Pa), and introduced at the top of the column 6.
- From the mixing column 6A are drawn three streams of fluid : at its base, liquid close to the rich liquid and joined to the latter via a pipe 15A provided with an expansion valve 15A '; at an intermediate point, a mixture essentially consisting of oxygen and nitrogen, which is returned to an intermediate point of the low pressure column 4A via a pipe 16A provided with an expansion valve 17A; and at its summit of impure oxygen which, after heating in the heat exchange line, is evacuated, substantially at the pressure P, of the installation via a pipe 18A as production gas Ol.
- auxiliary heat exchangers 19A, 20A, 21 A ensuring the recovery of the cold available in the fluids circulating in the installation.
- FIG. 2 schematically shows an integrated device for enriching an air flow intended for a blast furnace according to the prior art.
- An air flow is compressed in a blower S to form a compressed flow 1.
- This flow is divided into two fractions 2 and 3.
- the first fraction 2 is cooled by means of a cooler R, for example a cooler with the water, compressed in a suppressor C and sent to an air separation unit (ASU).
- the air separation device operates for example by cryogenic distillation and comprises a purification unit and an exchange line and upstream of the separation columns. It produces an oxygen flow containing between 80 and 95 mol%. oxygen 10 and a nitrogen flow 11 which can be a residual flow. At least part of the oxygen-enriched flow 10 is mixed with the second air fraction 3.
- the mixed oxygen-enriched flow 15 is heated in a Cowpers W and sent to an HF blast furnace.
- a compressor C will be installed. It makes it possible to read the pressure of the entire air flow intended for the air separation device according to Figure 2) or (as a variant of Figure 1) of the air flow intended to supply the column
- An object of the invention is to integrate an air separation unit into this steel process more economically and more reliably, without no use of gas flow compressors in the air separation unit other than those linked to the expansion turbine shaft ensuring that the separation unit is kept cold.
- a method for enriching a pressurized gas flow with one of its constituents A comprising the steps of i) dividing the stream into at least a first and a second fraction; ii) send at least part of the first fraction to a separation unit; iii) supplying from the separation unit at least a first and a second flow rate, the first flow rate of which has a content of constituent A greater than that of the first fraction; iv) mixing at least part of the first flow with at least part of the second fraction to form a pressurized gaseous mixture characterized in that the second fraction is relaxed before mixing at least part of the first flow.
- the pressurized gas flow and the first fraction have substantially the same pressure and in particular only the pressure drops are the cause of pressure variation between these two fluids;
- the first flow and the second expanded fraction have substantially the same pressure and in particular only the pressure drops are the cause of pressure variation between these two fluids;
- the separation unit is autonomous in need of energy for compression of the gas flows produced by the unit or intended for the unit;
- the pressurized gas flow is air and optionally component A is oxygen;
- - the pressurized gas flow is air intended for a blast furnace;
- the separation unit is a separation unit operating by cryogenic distillation;
- the separation unit comprises a medium pressure column, a low pressure column thermally connected with the medium pressure column and a mixing column; - No part of the first fraction intended for a distillation column is compressed or no part of the first fraction intended for the mixing column or the medium pressure column is compressed following the flow division;
- a particular operating mode i) according to a first step at least part of the first fraction is compressed and no do not
- an installation for enriching a pressurized gas flow with one of its constituents A comprising i) means for dividing the pressurized gas flow into at least a first and a second fractions ii) a separation unit iii) means for sending at least part of the first fraction to the separation unit iv) means for mixing at least part of a first flow produced by the separation unit and enriched in A with respect to the first fraction with the second fraction to form a flow enriched in A with respect to the pressurized gas flow characterized in that it comprises means for relaxing the second fraction upstream of the means for mixing therein at least one part of the first flow and downstream of the means for dividing the gas flow.
- the separation unit is an air separation unit comprising a medium pressure column, a low pressure column thermally connected with the medium pressure column and a mixing column; - the installation does not include any air compression means intended for the medium pressure column or the mixing column; - The installation comprises means for compressing the second fraction and means for sending the second fraction to be mixed with at least part of the first flow without passing through the expansion means.
- the separation process will advantageously use a mixing column operating at a pressure greater than or equal to the medium pressure column, without requiring any additional means of air compression. It is thus proposed to integrate a mixing column device on a blast furnace wind without additional air compressor, thus increasing the reliability of supply of oxygen molecules and therefore enriched air to the blast furnace, while minimizing the investment. necessary for this realization.
- an air separation process using an apparatus comprising at least one medium pressure column, a low pressure column thermally connected with the low medium pressure column and a mixing column operating at a pressure above the pressure of the medium pressure column in which i) compressed and purified air is sent to the medium pressure column ii) flows enriched in nitrogen and oxygen from the medium pressure column to the column low pressure iii) an oxygen-enriched liquid is sent from the low-pressure column to the head of the mixing column iv) an oxygen-enriched gas is drawn off from the head of the mixing column characterized in that a liquid flow enriched in nitrogen from the medium pressure column, it is pressurized, it is vaporized at least partially and the tank of the mixing column is supplied with at least part of the vapor liquid Orise.
- the nitrogen-enriched liquid is vaporized by heat exchange with part of the supply air.
- the air thus liquefied can be sent to at least one of the medium and low pressure columns.
- the nitrogen-enriched liquid is pressurized by a pump and or by hydrostatic pressure.
- an air separation installation comprising a) a medium pressure column, b) a low pressure column thermally connected with the low medium pressure column c) a mixing column operating at a pressure above the pressure of the medium pressure column d) means for sending compressed and purified air to the medium pressure column e) means for sending enriched nitrogen and oxygen flows from the medium pressure column to the low pressure column f) means for sending an oxygen enriched liquid from the low pressure column to the head of the mixing column g) means for withdrawing an oxygen-enriched gas from the head of the mixing column, characterized in that it comprises means for withdrawing a liquid flow enriched in nitrogen from the medium-pressure column, means for pressurizing the liquid, means for vaporizing the liquid at least partially and means for supplying the tank of the mixing column with at least part of the vaporized liquid.
- Figures 3 and 5 show an apparatus for enriching a gas flow according to the invention and Figure 4 shows a separation device particularly adapted to carry out the invention.
- Figure 3 schematically shows an integrated device for enriching an air flow intended for a blast furnace according to the prior art.
- An air flow is compressed in a blower S to form a compressed flow 1.
- This flow is divided into two fractions 2 and 3.
- the first fraction 2 is cooled by means of a cooler R, for example a cooler with the water, and sent to an air separation unit (ASU) without being compressed between the chiller and the inlet of the air separation unit.
- the air separation unit operates for example by cryogenic distillation and comprises a purification unit and an exchange line upstream of the separation columns.
- FIG. 1 shows elements of Figure 1 having the same reference numbers which will not be described in detail.
- the purified air 7A at a medium pressure of 5.45 bars a from the main air compressor of the blast furnace wind or from an expansion turbine is separated into at least two separate bundles before entering the column medium pressure 2A.
- the first beam 100 directly feeds the medium pressure column tank 2A in gaseous form.
- the second bundle 200 is at least partly condensed in a heat exchanger 101 A.
- the liquefied part is introduced into one of the columns to be distilled (either the medium pressure column 2A or the low pressure column 4A).
- the flow 202 is sent to the bottom of the medium pressure column while the flow 204 is sent to the low pressure column after sub-cooling in the exchanger 19A.
- a liquid flow 300 enriched in nitrogen relative to the air is withdrawn from the medium pressure column 3A, compressed by means of a pump 400 or by simple hydrostatic height, vaporized in the heat exchanger 101 A against the condensation of medium pressure air to form a flow of nitrogen gas 500 then feeds the mixing column tank 6A.
- the supply of the mixing column 6A is done at a pressure higher than that of the air 100 supplying the medium pressure column 3A, and this without additional compressor.
- the heat exchanger 101 A has a ⁇ T of 0.6 ° C.
- the flow 15A coming from the tank of the mixing column 6A, being richer in nitrogen than that of FIG. 1 is sent just below the head of the low pressure column 4A.
- the sub-cooler 21A is eliminated and there is no longer any withdrawal of nitrogen gas medium pressure NG.
- a third air beam is sent to a booster 8A, cooled in the exchange line 1 A and expanded in the blowing turbine 9A but other means of producing frigories are to be envisaged, including the expansion of the air intended for the medium pressure column. If this booster is present, the advantage of the invention is that it does not have an air compression step for the air intended for the mixing column or the medium pressure column. For the case of Figure 4 the extraction efficiency is reduced and the separation energy of the assembly remains higher than the basic case.
- FIG. 5 schematically shows an integrated device for enriching an air flow intended for a blast furnace according to the prior art.
- An air flow is compressed in a blower S to form a compressed flow 1.
- This flow is divided into two fractions 2 and 3.
- the first fraction 2 is cooled by means of a cooler R, for example a cooler with the water, compressed in a booster C and sent to an air separation unit (ASU).
- the air separation unit operates for example by cryogenic distillation and comprises a purification unit and an exchange line upstream of the separation columns. It produces an oxygen flow containing between 80 and 95 mol%. oxygen 10 and a nitrogen flow 11 which can be a residual flow.
- the second fraction of air 3 is expanded by an expansion means V, which can be a valve, an orifice, a pipe with reduced diameter or a turbine, for example. At least part of the oxygen-enriched flow 10 is mixed with the second fraction of expanded air 3 downstream of the expansion means V.
- the mixed oxygen-enriched flow 15 is heated in a Cowpers W and sent to a HF blast furnace.
- the booster C and the valve C have short-circuiting means. According to a first step of the apparatus, the first fraction 2 is compressed and the second fraction is not relaxed. In a second step, you do not compress at least part of the first fraction and the second fraction is relaxed before mixing therein at least part of the first flow.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0416327-3A BRPI0416327A (en) | 2003-11-10 | 2004-11-05 | method and installation for enriching a gas stream with one of the components thereof |
JP2006538907A JP2007512491A (en) | 2003-11-10 | 2004-11-05 | Method and apparatus for concentrating one component of a gas stream |
US10/577,621 US20080034790A1 (en) | 2003-11-10 | 2004-11-05 | Method And Installation For Enriching A Gas Stream With One Of The Components Thereof |
EP04805813A EP1697690A2 (en) | 2003-11-10 | 2004-11-05 | Method and installation for enriching a gas stream with one of the components thereof |
US13/046,141 US20110192193A1 (en) | 2003-11-10 | 2011-03-11 | Method And Installation For Enriching A Gas Stream With One Of The Components Thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0350819A FR2862004B3 (en) | 2003-11-10 | 2003-11-10 | METHOD AND INSTALLATION FOR ENRICHING A GASEOUS FLOW IN ONE OF ITS CONSTITUENTS |
FR0350819 | 2003-11-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/046,141 Division US20110192193A1 (en) | 2003-11-10 | 2011-03-11 | Method And Installation For Enriching A Gas Stream With One Of The Components Thereof |
Publications (3)
Publication Number | Publication Date |
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WO2005047790A2 true WO2005047790A2 (en) | 2005-05-26 |
WO2005047790A3 WO2005047790A3 (en) | 2005-08-11 |
WO2005047790A8 WO2005047790A8 (en) | 2006-06-01 |
Family
ID=34508749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/050570 WO2005047790A2 (en) | 2003-11-10 | 2004-11-05 | Method and installation for enriching a gas stream with one of the components thereof |
Country Status (7)
Country | Link |
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US (2) | US20080034790A1 (en) |
EP (1) | EP1697690A2 (en) |
JP (1) | JP2007512491A (en) |
CN (1) | CN100543388C (en) |
BR (1) | BRPI0416327A (en) |
FR (1) | FR2862004B3 (en) |
WO (1) | WO2005047790A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2884305A1 (en) * | 2005-04-08 | 2006-10-13 | Air Liquide | Carbon dioxide separating method for iron and steel industry, involves receiving flow enriched in carbon dioxide from absorption unit, sending it towards homogenization unit and subjecting carbon dioxide to intermediate compression stage |
CZ302279B6 (en) * | 2005-07-04 | 2011-01-26 | Cervenka@Jan | Balancing method of fluctuating concentration of component or components in flowing gas |
FR2960555A1 (en) * | 2010-05-31 | 2011-12-02 | Air Liquide | Integrated installation comprises an air separation apparatus, a blast furnace, a unit for preheating the air, an adiabatic air compressor, a first pipe to introduce the air towards the preheating unit, and a unit for heating water |
US20130000352A1 (en) * | 2011-06-30 | 2013-01-03 | General Electric Company | Air separation unit and systems incorporating the same |
US9920987B2 (en) * | 2015-05-08 | 2018-03-20 | Air Products And Chemicals, Inc. | Mixing column for single mixed refrigerant (SMR) process |
Citations (6)
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US3731495A (en) * | 1970-12-28 | 1973-05-08 | Union Carbide Corp | Process of and apparatus for air separation with nitrogen quenched power turbine |
US3940263A (en) * | 1973-09-25 | 1976-02-24 | Bartolomeo Morello | Steelmaking with inert gas blowing |
US4022030A (en) * | 1971-02-01 | 1977-05-10 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Thermal cycle for the compression of a fluid by the expansion of another fluid |
FR2758621A1 (en) * | 1997-01-22 | 1998-07-24 | Air Liquide | Air gas consumer unit feed procedure, used e.g. for cryogenics |
EP0959314A2 (en) * | 1998-05-22 | 1999-11-24 | Air Products And Chemicals, Inc. | Indirect fired gas turbine integrated with an air separation unit |
US20020033566A1 (en) * | 2000-09-18 | 2002-03-21 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Oxygen-enriched air feed for a non-ferrous metal production unit |
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US3126265A (en) * | 1964-03-24 | Process and apparatus for separating | ||
JPS61139609A (en) * | 1984-12-13 | 1986-06-26 | Kawasaki Steel Corp | Oxygen enriching method of industrial furnace |
FR2677667A1 (en) * | 1991-06-12 | 1992-12-18 | Grenier Maurice | METHOD FOR SUPPLYING AN OXYGEN-ENRICHED AIR STOVE, AND CORRESPONDING IRON ORE REDUCTION INSTALLATION. |
FR2680114B1 (en) * | 1991-08-07 | 1994-08-05 | Lair Liquide | METHOD AND INSTALLATION FOR AIR DISTILLATION, AND APPLICATION TO THE GAS SUPPLY OF A STEEL. |
FR2712383B1 (en) * | 1993-11-12 | 1995-12-22 | Air Liquide | Combined installation of a metal production unit and an air separation unit. |
US5454227A (en) * | 1994-08-17 | 1995-10-03 | The Boc Group, Inc. | Air separation method and apparatus |
FR2753638B1 (en) * | 1996-09-25 | 1998-10-30 | PROCESS FOR SUPPLYING A GAS CONSUMER UNIT | |
FR2774158B1 (en) * | 1998-01-23 | 2000-03-17 | Air Liquide | COMBINED INSTALLATION OF AN OVEN AND AN AIR DISTILLATION APPARATUS AND METHOD OF IMPLEMENTING IT |
FR2774159B1 (en) * | 1998-01-23 | 2000-03-17 | Air Liquide | COMBINED INSTALLATION OF AN OVEN AND AN AIR DISTILLATION APPARATUS AND METHOD OF IMPLEMENTING IT |
US6568207B1 (en) * | 2002-01-18 | 2003-05-27 | L'air Liquide-Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Integrated process and installation for the separation of air fed by compressed air from several compressors |
US20060266048A1 (en) * | 2005-05-27 | 2006-11-30 | Bell Leonard E | Fluid catalytic cracking flue gas utility optimizing system and process |
-
2003
- 2003-11-10 FR FR0350819A patent/FR2862004B3/en not_active Expired - Lifetime
-
2004
- 2004-11-05 EP EP04805813A patent/EP1697690A2/en not_active Withdrawn
- 2004-11-05 WO PCT/FR2004/050570 patent/WO2005047790A2/en active Application Filing
- 2004-11-05 BR BRPI0416327-3A patent/BRPI0416327A/en not_active IP Right Cessation
- 2004-11-05 JP JP2006538907A patent/JP2007512491A/en active Pending
- 2004-11-05 CN CN200480033075.4A patent/CN100543388C/en not_active Expired - Fee Related
- 2004-11-05 US US10/577,621 patent/US20080034790A1/en not_active Abandoned
-
2011
- 2011-03-11 US US13/046,141 patent/US20110192193A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US3731495A (en) * | 1970-12-28 | 1973-05-08 | Union Carbide Corp | Process of and apparatus for air separation with nitrogen quenched power turbine |
US4022030A (en) * | 1971-02-01 | 1977-05-10 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Thermal cycle for the compression of a fluid by the expansion of another fluid |
US3940263A (en) * | 1973-09-25 | 1976-02-24 | Bartolomeo Morello | Steelmaking with inert gas blowing |
FR2758621A1 (en) * | 1997-01-22 | 1998-07-24 | Air Liquide | Air gas consumer unit feed procedure, used e.g. for cryogenics |
EP0959314A2 (en) * | 1998-05-22 | 1999-11-24 | Air Products And Chemicals, Inc. | Indirect fired gas turbine integrated with an air separation unit |
US20020033566A1 (en) * | 2000-09-18 | 2002-03-21 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Oxygen-enriched air feed for a non-ferrous metal production unit |
Non-Patent Citations (1)
Title |
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ARTHUR R SMITH ET AL: "Oxygen enrichment of air: process developments and economic trends" RESEARCH DISCLOSURE, KENNETH MASON PUBLICATIONS, HAMPSHIRE, GB, vol. 417, no. 63, janvier 1999 (1999-01), XP007123813 ISSN: 0374-4353 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005047790A3 (en) | 2005-08-11 |
EP1697690A2 (en) | 2006-09-06 |
US20080034790A1 (en) | 2008-02-14 |
US20110192193A1 (en) | 2011-08-11 |
BRPI0416327A (en) | 2007-01-09 |
CN1878999A (en) | 2006-12-13 |
FR2862004B3 (en) | 2005-12-23 |
CN100543388C (en) | 2009-09-23 |
WO2005047790A8 (en) | 2006-06-01 |
JP2007512491A (en) | 2007-05-17 |
FR2862004A1 (en) | 2005-05-13 |
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